arm64: dts: amlogic: meson-g12-common: Set the rates of the clocks for the NPU

Otherwise they are left at 24MHz and the NPU runs very slowly.
Signed-off-by: Tomeu Vizoso <tomeu@tomeuvizoso.net>
Suggested-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240110153704.1364073-2-tomeu@tomeuvizoso.netSigned-off-by: Neil Armstrong <neil.armstrong@linaro.org>

arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi

@@ -2502,6 +2502,9 @@ npu: npu@ff100000 {
 		clocks = <&clkc CLKID_NNA_CORE_CLK>,
 			 <&clkc CLKID_NNA_AXI_CLK>;
 		clock-names = "core", "bus";
+		assigned-clocks = <&clkc CLKID_NNA_CORE_CLK>,
+				  <&clkc CLKID_NNA_AXI_CLK>;
+		assigned-clock-rates = <800000000>, <800000000>;
 		resets = <&reset RESET_NNA>;
 		status = "disabled";
 	};